I believe it only works on your LAN. A better way to stream away from home might be to get a Slingbox, which can be had for about $20 on Ebay.
If you have a static IP, you could probably port forward the IP address of the SAT2IP stream, but according to
KE4EST the streaming function (called Big2Small on Amiko boxes) is being discontinued and is hit-or-miss.